The Klein Tools Lineman's Insulating 4-in-1 Box Wrench is the only double-ended 4-in-1 wrench on the market to meet the ASTM standard 1000V rating! It features a transparent handle that shows the metal ends of the wrench are not touching. The solid, durable wrench features four 12-point socket sizes: 1/2'', 9/16'', 5/8'', and 3/4''

Klein Tool Model No. KT223X4-INS

The only double ended 4 in 1 wrench on the market that meets the ASTM standard 1000V rating!